Universal pump



Oct. 5 1926.

. 1,602,301 G. GUTTNER UNIVERSAL PUMP Filed August 18, 1925 Patented Oct. 192

GEOBG Gll'TTNER} OF BERLIN, GERMANY.

UNIVERSAL rumr.

Application filed August 18, 1925, Serial No. 51,016, and in Germany August 28, 192i.

My invention relates to universal pumps which can be used for many diiferent purposes as e. g. pumping liquidand gaseous substances, compressing gases and even de- 5 livering power when used as engines.

In particular my invention relates to that type of universal pump in which a circular piston is in hinged connection witha cylindrical casing and during its planetary move- 10 ment is in frictional or bearing contact with the inner periphery of the enclosing casing thereby forming a closure between the induction and eduction' ports.

One of the objects of my invention is to provide means by which the bearing pressure of the piston against the casing can be readily controlled and readjusted within certain limits so as to compensate for wear and tear occurring at the piston proper and the enclosing casing.

Another object of my invention is to provide means by which the bearing pressure of the piston against the casing can be controlled and adjusted with regard to different heads of the delivered fluid. It is ohvious that the bearing pressure should be smaller in case of delivering the fluid at a low head than at a high head.

It is particularly desirable to adjust the hearing pressure of the piston with those types of universal pumps in which the circular shaped piston is not directly or positively driven by an excenter but by an intermediate elastic member, such as a helical spring of which the windings are in close contact with each other, or an elastic steel tube torsionally loaded at right angles to its longitudinal axis.

With an apparatus of this type and de- 40 sign it is possible to develop exceedingly high pressures at the delivery side, if used as a pump.

Heretofore it has been triedto adjust the 'bearing pressure of the clrcular shaped piston by placing one or more thin supporting plates under the elastic member; by this method however the bearingpressure could not be accurately adjusted at once for a definite pressure of the delivered fluid. Moreover an accurate adjustment by said method could not be obtained except by taking the' pump apart, inserting supporting plates referred to above, assembling and subsequently operating the pump. It often becomes necessary to repeatedly take the pump apart before the accurate pressure required for the individual purpose is established.

Hence this is a particularly tiresome and time consuming method, and constitutes a very serious drawback in cases where the pump is working with ill smelling or noxious gases or liquids.

The primary obj overcome the said difiiculties. The invention comprises the arrangement of an excentric sleeve-engaging the excenter for operating the piston, by which the bearing iressure of the: piston against the casing can 0 readily adjusted by hand from without,

- or 18 automatically adjusted bvthe increasing or deercusing pressuir of the fluid within the casing. I

The main features of the mechanism incorporating my invention are briefly outlined in the appended claims and shall be more fully explained with the aid of the accompanying drawings in which- Fig. 1 is a cross sectional view of the pump with the new mechanism.

Fig. 2 is a longitudinal section taken along line II-II of Fig. 1,

Fig. 3 shows the driving spindle with an enlarged collar, and

Fig. 4: shows the sleeve which is loosely rotatable on the collar of the driving spindle and is provided with inclined slots.

The invention is illustrated by way of an example in connection with a known type of pumps comprising a casing-1, a circular piston 2, a sliding hinge or vane member 3, a driving spindle 4 and an excenter 5; the bearing of the'piston 2 in this case is not of an elastic character. 7

According to my invention the excenter 5 is provided with an excentric sleeve 6, the arrangement being such that the excentricect of my invention is to ity of the latter can be controlled by hand A preferable arrangement and design of the parts for carrying my invention 1nt o effect is shown in the drawing. The drivingspindle 5 is provided with a longitudinally extending hole 7 and is formed at 1ts excentric collar with a slot 8, the hole 7 extending at 7 beyond the collar and its slot.

The excentric sleeve 6 is formed at opposite sides with two diagonal slots 9 and 10, located so as to cooperate with slot 8.

A catch member 11 extending through and engaging the diagonal slots 9 and 10 is inserted in slot 8 and is engaged at one side by the shaft 12 of a screw 13, and at the other side by a spring 14, located within the extension 7 referred to above.

It will be seen that the shifting of the catch member 11 effects a corresponding revolving of the sleeve 6 in clockwise or anticlockwise direction.

The arrangement and the working conditions of the parts under consideration are such that when catch 11 is approximately in the middle part of slot. 8, point A, representing the full excentricity of sleeve 6 is then located in front of (before) point B viz, with regard to the clockwise rotation of the eXcentric collar 5, indicated by arrow 15.

The working of the pump and is adjusting mechanism is as follows:

After assembling the pumpv shaft 12 is screwed into the driving spindle 4 until catch 11 is shifted approximately to the middle of slot 8. Thereby spring 14 is put under tension, and the exccntric sleeve 6 by reason of its diagonal slots 9 and 10 being engaged by catch 11, is swung around the excenter 5 of the driving spindle.

Owing to this angular rotation of the excentric sleeve 6 the total excentricity, effective at the driving spindle, is increased, causing the piston to bear against the inner surface of casing 1, the bearing pressure being such that a tight engagement for a relatively low pressure of the delivered fluid is obtained.

WVhenever the fluid is to be discharged at a higher pressure the backpressure on the piston and from the latter to the driving spindle will increase correspondingly. By the increased back pressure .or resistance automatically coming into action the excentric sleeve 6 mounted on the excentric collar 5 of the driving spindle 4 is given an angular swinging movement. Thereby catch 11, engaging the diagonal slots .9, 10

of the excentric sleeve 6, is first shifted to- 1 wards spring 14, thus increasing the tension of the latter, and, by turning the excentric sleeve 6, increases also the total excentricity of the driving members.

Consequently the piston is pressed against the walls of the casing 1 at a'higher rate corresponding to the higher discharge pressure of the fluid.

On the decreasing; of the'discharge presstruction of 'member arranged interiorly sure of the fluid the back pressure on the piston will decrease correspondingly, and the tensioned spring 14 will thenshift back the catch 11 whereby the excentric sleeve 6 is swungbackwards, and in turn the bearing pressure of the piston against the walls of the casing 1 decreases, until catch 11 by means of spring 14 comes into contact with the shaft 12 thereby establishing the original' setting for the initial-relatively lowpressure of the fluid and the piston respectively.

Many changes may be made in the conpumps without materially deviating from the spirit of my invention.

What claim is:

1. A rotary pump comprising a circular casing, having inlet and outlet ports, a

piston member adapted to describe a planetary movement within said housing, rating member connected With said and the casing and forming a wall between the inletand outlet ports, a rotating shaft in operative connection with the piston, an eccentric collar rigidly connectedwith the shaft and provided with a longitudinal slot, a rotatable eccentric sleeve mounted loosely on said collar and provided with diagonal slots, and a catch member mounted slidably within the slot of theeccentric collar ably within the slot of the eccentric collar 1 and engaged in the diagonal slots a spring of the shaft a sepa- I,

piston perpendicularto the catch member and acting thereon.

A rotary pump comprising a circular casing, havinginlet and outlet ports, ton member adapted to describe a'planetary movement within said housing, a separating member connected with said piston and the casing and forming a wall between the inlet and outlet ports, a rotating shaft in operative connection with the piston, an eccentric collar rigidly connected with the shaft and provided with a longitudinal slot,v a rotatable eccentric sleeve mounted loosely 'on said collar and provided with diagonal slots, slidably within the slot of the eccentric collar and engaged in the diagonal slots, a spring member arranged interiorly of the 1 lli apisshaft perpendicular to the catch member and acting thereon, a pressure member adjustably arranged in said shaft and capable of being manually adjusted from the exterior of the pump casing, the pressure member extending into the slot of the eccentric collar of the shaft, said spring and pressure member being adapted to act on name to this specification.

the catch member and to move the latter within the eccentric collar and the eccentric 10 sleeve encompassing the latter and thus to vary the pressure of the piston on the internal wall of the housing.

In testimony whereof I GEORG GUTTNER.

have signed my 

